Photographic-plate holder for use with x-rays.



- Y H. WHITE.l PHOTOGRAPHIC PLATE HOLDER FOR USE WITH XRAYS.

' APPLICATION FILED IUNE 21, 19133 v Patnted .Tanl, 1916.`

ATTORNEY 'UNTTED sTATEs PATENT oEEioE.

GEORGE H. WHI'III/l OF HAVEREORD, PENNSYLVANIA.

PHOTOGRAPHIC-PLATE HOLDER- FOR USE WITH X-RAYS.

Application filed June 21, 1913.

T0 all ywhom 'it may concern Be it known that I, GEORGE II. lVn'iTE, a citizcnfof the United States, residing at Haverford, county of Delaware, State of Pennsylvania, have invented certain new and useful Improvementsv in Photographic-Plate Holders for Ilse with X-I'ays, of which the following is a specification.

My invention relates to photographic plate holders, and more particularly to holders or cassettes for sensitized plates, or sensitized plates and intensifying screens, the holders of cassettes being opaque to ordiy nary daylight but translucent or transparent, on one or more sides, to X-rays or the like.

It is the object of my invention tolproducc such a holder or cassette of simple construction and which in use shall require a' mini'- inuin number of operations or motions on the part of the user.,

It is a further object of my invention to provide such a structure which shall insure good contact between the photographic plate and the intensifying scicen, ifthe latter be used.

It is a further object of my invention to provide a construction in which photographic plates smaller than the maximum accommodated by the holdermay be used without recourse to supplemental apparatus, such as kits.

To these ends I have provided a holder or cassette comprising a base or frame to which is attached a cover, the base or frame carrying a pressure plate, between which and the cover is held the photographic plate, or the vphotographic plate and intensifying screen.

My invention .resides in the features of construction hereinafter described and claimed. 4

For an illustration of one of the forms my invention may take reference is to be had to the accompanying drawing, in which:

Figure 1 is a top plan view of the holder, some 'parts broken away and some parts shown in horizontal section. Fig. 2 is a vertical sectional view taken on the line .Fr-A of Fig. 1. Fig. 3 is a fragmentary vertical sectional view, some parts in elevation, taken on the line B-B of Fig. 1. Fig. 4 is a frag mcntary vertical sectional view taken on the line C-C of Fig. 1.

Referring to the drawing, 1 is a base or frame member which may be made of wood or any other suitable material. To the up- Specicaton of Letters Patent.

Patented Jan. 4, 1916.

serial no. 774,949.

per side of the base 1 are secured by screws 2 a hinge or hinges, each comprising the member 3 held by said screws 2, an intermediate hinge member 4 pivoted to the member 3 at the member l being in turn hinged at (3 to the plate 7 secured by rivets 8 or any other suitable means to the downwardly extending margin or flange 9 of the cover 10. Associated with one of the members l is a spring 11, disposed in a countcrsink in the base 1, the spring 11 thrusting up against the under side of the member 4t. A screw or other suitable means 12 extends freely through a hole in the member 4 into the base 1, the head of the screw serving to limit pivotal. movement of the member f1 at 5 in an upward or counter-clockwise direction as viewed in Fig. 3.

To the two side margins or flanges 9, as viewed in Fig. 1, are secured catches 13 each having an inclined edge 14 and a notch 15, as shown in Fig. 3, adapted to receive the pin 1G carried by and extending transversely to the push rod 17 which is movable longitudinally in the base 1, one end extending out at the front of the base, as shown in Fig. 1. At its inner' end the rod 17 is forked or slotted as indicated at 18, Fig. 1, the pin 19 extending transversely to the rod 17 and held in the -base 1 and extending through the slot 1S. A spring 2O surrounds the rod 1l' and is confined between the pins 16 and 19 and tends to thrust the rods 17 outwardly toward the front of the base. rFhe pin 1G extends through the circular or other hole 21 in the base 1 and is disposed between the two plates QQ extending across the opening 21, the plates being preferably of metal and set into the base 1.

Extending around the four margins of the base or frame 1 is the slot 23 communicating with the upper surface of the base 1 through the narrower slot 2l through which the tlanges 9 are adapted to extend and engage with their lower edges upon the felt or si mi* lar mater'al 25 supported upon the preferably resilient strips 26, such as spring brass, beneath which iu counter-sinks in the base 1 are disposed the springs 27 normally thrust ing the strips 2G and felt 25 upwardly, but

` yielding when the cover 10 is closed.

In counter-sinks in the base 1 are provided also a plurality of springs 28 thrusting against the lower side of the pressure plate Q9 covered with a layer of felt or other` suitable material 30. It a plurality of llt;

points the plate 29 is counter-sunk as indiplace to allow vertical movement thereof.

and limit ysuch vertical movement. The base 1 has counter-sinks 33 beneath the countersinks 31 to allow ample movement of the plate 29.

The inside of the cover 10 is preferably lined with a sheet 31 of felt, paper `or the like. And between such sheet and the felt 30 upon plate 29 is placed the photographic plate 35, either above or below which, if desired, may be placed an X-ray intensifying screen.

The operation isas follows: Assuming the holder or cassette loaded with a sensitized plate and locked closed, as indicated in the drawing, the holder may be placed in proper relation with respect to the X-ray tube and the patient. Generally the aluminum cover 10, translucent or transparent to X-rays, is placed next to the patient and toward the X-ray tube. `The exposure is then made by exciting the X-ray tube in the usual way. To remove the photographic plate from the holder, the holder is carried to the dark room, unless the sensitized plate is itself inclosed ina light proof envelop. The operator then presses inwardly upon the outer ends of rods 17, thus carrying the pins 16 out of the notches 15 of the catches 13, freeing the cover 10 which may be raised manually, or which is raised by the torsion sp1 ing G which is a piece of resilient wire extending through and forming the pivots for the two hinge members 4, andbeing hooked back at 6a. One-of these hook ends, the right hand one, Fig. 1 presses against the rear flange 9 of the cover 10 while the left hand one rests against the hinge member t. lllhen the cover is unlatched by pressing the rods 17, 17 in opposition to their springs 20, the cover first rises vertically, the hinge members 1 swinging slightly upon their pivots 5 until limited by screws 12. The spring 11 and the torsioi spring 6 at its end at opposite plate el produce this vertical movement. And during such vertical movement the springs 27- raise the members 26 and attached felt 25 upwardly against the' base 1, and springs 28 raise plate 29. After this initial vertical movement of the cover it swings to open vertical position. The plate 85 is then removed.l ln reloading, a plate 35 is placed upon the felt 30 upon the pressure plate 29 and the cover closed by swinging upon its hinges in opposition'to spring 6 until it is substantially horizontal or parallel with the base 1. 'lhen vertical pressure downward upon the cover 10 causes the catches 13 to move downwardly, the edges 11 engaging upon the upper sides ofthe pins 16 and forcing them and their attached rods 17 in- 'wardly in opposition to springs 2O until the pins 1G come opposite the notches 15 whereupon the springs 2O restore the rods 17` notches l5, thus holding the cover closed.

And in this vertically downward movement y of the cover the lower edges of the flanges 9 engage the felt light proofing strips 25 upon yielding strips Q6, pressing these strips downwardly in opposition` to springs 27 which accordingly lio-ld the light proofing material snugly against the lower edges of flanges 9. Pressure plate 29 yields downwardly inopposition to springs 28 to firmly outwardly and move the pins 16 linto these v hold the plate 35 in position between felt 30 vand cover lining 31. The initial verticalmovement of the cover with respect to the l base Jrevents rubbin r and scratchin' of the photographic plate7 and of the intensifying If it is desired that the holder shall be4 opaque to X-rays from the bottom, either the base 1 oithe plate 29 may be made of suitablevmaterial opaque to X-rays.

By means of the pressure plate construction described, in addition to the functions hereinbefore stated in connection with the same, photographic plates smaller than the maximum capacity of the holder may be used, the same being heldin place by the pressure plate 29 wherever placed upon such pressure plate when loading the holder. By this means the use of kits or other supplemental devices is avoided. y

What I claim is:

1. In an X-ray plate holder, the combination with'a base, of a cover, a pressure plate resiliently mounted on said base, a member pivoted to said base between said base and said pressure plate, and a pivotal connection between said cover and said member.

2. A holder for exposing a sensitized member to X-rays comprising the combination with a base, ofv a cover, said cover and base excluding ordinary light from a sensitized member held between them, a plurality of hinges connecting an edge of said cover and base, each of said hinges comprising members secured respectively to said base and cover and an intermediate member plvoted to 'said members, a torsion spring `whose one end bears against said cover and whose other end bears against the intermediate member of one o'f said hinges, and a yieldingly mounted 0n said base for movebase.

inturned iiange, said base having aslot comf .municating with a narrower slot, and rel siliently mounted light proofing material'. disposed in said slot, said flanges adapted. to extend through said narrower slot into h engagement with said material.

turned flange, and light proofingmaterial resiliently mounted in a slot in and engaged by said lange.

6. A holder for exposmg asensitizedlz member to X-rays comprisingthe combinawhose external surface is substantially smooth or unobstructed, whereby. the object to be subjected to X-rays may closely con-v tact said external surface, a pressure plate ment substantially parallel with said base,

and marginal flanges onsaid cover surrounding said pressure plate..

'7. A 'holder for exposing a sensitized member to X-rays comprising the combina- Xray plate holder, vthe combi"l tion with a base, of a cover, a pressure plate yieldingly mounted Aupon saidi base, said cover and said pressure plate adapted to exclude ordinary light from a sensitized member held between them, flanges on the edges of said cover, and light proof material resiliently mounted on said base and adapted to be engaged by said flanges.

8. .In an X-ray plate holder, the combination with a base, of

said cover having an unobstructed external surface, whereby the object subjected toQX- rays may closely contact with said cover at :anyxportion of said external surface,-v marginal flanges on said cover engaging in said ase, and Imeans between saidcover and 5. In an X-ray plate holder, the combi-'- base .andl surrounded by said flanges for nation with a base, of a coverhavlng an inf4 j y'thrustin 'a `sensitized member' against the inside 'o said cover.

againstfthe inside of said cover.'

In testimony whereof I have hereunto affixed my signature in the presence of the two subscribing witnesses. v

Witnesses: v

A. S. MARSH, N. B. EVANS.

a cover opaqueto ordinary light and transparent to X-rays,

'j 9. Inan Xray plate holder, the combinaf ytion withfa base, of `a cover transparent to *Xfrays having -aninturned flange, light jproofing 'material resiliently mounted on tion with a base, of a cover opaque to ordi-` nary light and transparent to Xl-rays and y GEQRGE'H. WHITE. 

